Designed Oscar Niemeyer and Le Corbusier, 1952. It is the Secretariat, where thousands toil at clerical jobs, and not the General Assembly that visually defines the UN complex.
The UN Secretariat Building is a 154 m (505 ft) tall skyscraper that was designed by Oscar Niemeyer and Le Corbusier and completed in 1952. The building has 39 stories and houses the administrative functions of the UN, including day-to-day duties such as finance and translation.